JPH0215502Y2 - - Google Patents
Info
- Publication number
- JPH0215502Y2 JPH0215502Y2 JP1989024838U JP2483889U JPH0215502Y2 JP H0215502 Y2 JPH0215502 Y2 JP H0215502Y2 JP 1989024838 U JP1989024838 U JP 1989024838U JP 2483889 U JP2483889 U JP 2483889U JP H0215502 Y2 JPH0215502 Y2 JP H0215502Y2
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- head
- cylinder
- syringe
- seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000003814 drug Substances 0.000 claims description 21
- 229940079593 drug Drugs 0.000 claims description 19
- 238000005452 bending Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000008194 pharmaceutical composition Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000507 anthelmentic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
- A61M5/31551—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe including axial movement of dose setting member
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31501—Means for blocking or restricting the movement of the rod or piston
- A61M2005/31508—Means for blocking or restricting the movement of the rod or piston provided on the piston-rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/31561—Mechanically operated dose setting member using freely adjustable volume steps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/3159—Dose expelling manners
- A61M5/31591—Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Steroid Compounds (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、注射器、特にプラスチツク注射器、
そして特に粘稠な薬剤組成物を分与するためのプ
ラスチツク注射器に関するものである。[Detailed description of the invention] Industrial application field The invention is applicable to syringes, especially plastic syringes,
It particularly relates to plastic syringes for dispensing viscous pharmaceutical compositions.
従来の技術
従来の予め薬剤が充填された注射器の製造には
問題があり、十分なる解決策が見い出されていな
い。通常、注射器の排出端に先ずキヤツプをし、
円筒中に薬剤を適当な深さまで入れ、次いでシー
ルを有するプランジヤーの先端が薬剤と接触する
まで、プランジヤーを押し込む。BACKGROUND OF THE INVENTION The manufacture of conventional pre-filled syringes is problematic and no satisfactory solution has been found. Usually, the discharge end of the syringe is first capped,
The medicament is placed in the cylinder to the appropriate depth and the plunger is then pushed in until the tip of the plunger with the seal contacts the medicament.
考案が解決しようとする問題点
円筒中の薬剤の上の空気は、この最終段階の間
に何らかの方法で排除しなければならない。これ
は、プランジヤー先端のシール中に空気の抜け穴
を設けることによつて、または円筒の壁とシール
との間に針金または類似の道具を手で挿入して空
気抜きを生じさせながらプランジヤーを挿入し次
で針金を取り去ることによつて、達成することが
できる。前者の方法は、空気抜きの穴から薬剤が
洩れるおそれがあるために不十分である。後者の
方法は時間がかかり且つ自動化した薬剤前充填技
術には向かない。後者の方法は、プランジヤー先
端上のシールが薄く柔軟なワイパー構造を有して
いることを必要とするが、このようなシールは、
特にプラスチツク製である場合に、容易に変形を
受け、その結果、シールが不十分となるおそれが
ある。ゴムからなるシールは、薬剤またはその基
剤と不都合な反応を起すおそれがあるので、望ま
しくないことが多い。Problems that the invention seeks to solve: The air above the drug in the cylinder must be eliminated in some way during this final step. This can be done by inserting an air vent in the seal at the tip of the plunger, or by manually inserting a wire or similar device between the cylinder wall and the seal to create an air vent while the plunger is inserted and then This can be achieved by removing the wire at. The former method is unsatisfactory because there is a risk that the drug may leak from the air vent hole. The latter method is time consuming and does not lend itself to automated drug prefilling techniques. The latter method requires that the seal on the plunger tip have a thin, flexible wiper structure;
Particularly if it is made of plastic, it can easily undergo deformation, resulting in a poor seal. Seals made of rubber are often undesirable due to the risk of undesirable reactions with the drug or its base.
たとえばアメリカ合衆国特許2764981号、
2856925号、2869541号、2875761号および3934586
号の例のように、所定量の薬剤を投与するように
設計された多数の注射器が存在するが、それらの
すべては、所定の投与量を投与することができる
ように、プランジヤー上に種々の停止手段を有し
ている。アメリカ合衆国特許3563240号および
4153056号は、プランジヤーの軸にねじで取り付
けた環の使用によつて、所定投与量の精密な調節
を達成する注射器を示している。 For example, United States Patent No. 2764981,
No. 2856925, No. 2869541, No. 2875761 and 3934586
There are a number of syringes designed to administer a predetermined amount of a drug, as in the example in No. It has a stopping means. U.S. Patent No. 3,563,240 and
No. 4,153,056 shows a syringe that achieves precise control of the prescribed dose through the use of a ring threaded onto the shaft of the plunger.
問題点を解決するための手段
本考案の注射器は、上記の問題に対する解決を
提供するものであり且つ特にプラスチツク製の使
い捨て可能な注射器、特に、例えばペースト等の
ような粘稠な薬剤組成物を含有するものの自動前
充填に適している。Means for Solving the Problems The syringe of the present invention provides a solution to the above problems and is particularly useful for disposable syringes made of plastic, especially for viscous pharmaceutical compositions such as pastes, etc. Suitable for automatic pre-filling of contained materials.
本考案の注射器は、プランジヤーと、注射用薬
剤の排出端並びに排出端の反対側に該プランジヤ
ーを受け入れる開口端を有する円筒とから成つて
いる。プランジヤーは1本のシヤフトから成り、
円筒に挿入される先端部にプランジヤーヘツドを
有し、プランジヤーヘツドは離脱可能なプランジ
ヤーシールに係合する係合手段を有している。プ
ランジヤーシールは、プランジヤーヘツドと嵌装
する頭端部およびそれに連続する環状側部とから
成り、切れ目が設けられており、プランジヤーシ
ールの外側面は円筒の内壁との密封的な接触を備
え、且つその内側表面は、プランジヤーシールを
プランジヤーに保持するためのプランジヤーヘツ
ドの係合手段と協働する嵌合手段を有している。 The syringe of the present invention comprises a plunger, a cylinder having a discharge end for the injection drug and an open end opposite the discharge end for receiving the plunger. The plunger consists of one shaft,
It has a plunger head at its distal end inserted into the cylinder, and the plunger head has engagement means for engaging a removable plunger seal. The plunger seal consists of a head end mating with the plunger head and an annular side part continuous therewith, the plunger seal having a notch so that the outer surface of the plunger seal is in sealing contact with the inner wall of the cylinder. and its inner surface has engagement means for cooperating with the engagement means of the plunger head for retaining the plunger seal on the plunger.
切れ目は、プランジヤーシールの一端からプラ
ンジヤーシールの縦の軸線方向に概ね平行に延
び、プランジヤーシールの他端頭端部近傍で軸線
方向と概ね直角に短い距離折れ曲がり、更に該軸
線方向と概ね平行に再び折れ曲がりプランジヤー
シールの他端で終わる。切れ目によつて、組立て
の間にプランジヤーヘツド上にプランジヤーシー
ルを取付けることができるようにプランジヤーシ
ールを広げることを可能とするが、取付け後には
プランジヤーシールは正常な広がつてない状態に
戻ることができる。プランジヤーシールを円筒の
開口端に納めると、プランジヤーシールは圧縮を
受けるが切れ目の位置において表面上にきわめて
細い溝が残り、それによつて、プランジヤーシー
ルが薬剤と接触するまでプランジヤーを内側に押
込むときに、円筒内から空気を逃がすことが可能
となる。また、切れ目のこのような形状によつ
て、プランジヤーシールをプランジヤーヘツドに
はめ合わせされすれば、プランジヤーを円筒中に
挿入する間に、プランジヤーシールはよじれて開
くことがないように保たれる。その上、プランジ
ヤーシールの他端頭端部近傍に位置する、プラン
ジヤーシールの縦の軸線方向と概ね直角方向に折
れ曲がつた切れ目の部分は、プランジヤーを円筒
中に押し下げるときに切れ目によつて生ずる小さ
な溝からの薬剤の流出の防止を助ける。 The cut extends approximately parallel to the longitudinal axis of the plunger seal from one end of the plunger seal, bends a short distance approximately at right angles to the axis at the other end of the plunger seal near the head end, and further extends approximately parallel to the longitudinal axis of the plunger seal. Fold again parallel to end at the other end of the plunger seal. The cut allows the plunger seal to expand during assembly so that it can be installed on the plunger head, but after installation the plunger seal remains in its normal unexpanded state. can return to. When the plunger seal is placed in the open end of the cylinder, the plunger seal is compressed but leaves a very narrow groove on the surface at the location of the cut, which allows the plunger to be pulled inward until it comes into contact with the drug. This allows air to escape from inside the cylinder when pushing. The shape of the cut also prevents the plunger seal from twisting open during insertion of the plunger into the cylinder once the plunger seal is fitted into the plunger head. It can be done. In addition, the cut portion located near the other end of the plunger seal and bent in a direction approximately perpendicular to the vertical axis of the plunger seal can be This helps prevent the drug from leaking out through the small grooves that occur.
本考案の注射器の好適実施形態の一つにおいて
は、円筒の開口端から円筒中に入れた薬剤の水平
面よりもいくらか上方の所まで延びている1本以
上の小さな縦溝が、円筒の内壁に存在する。この
溝は、特に自動化した組立ての場合に、適正な深
さまでのプランジヤーの位置付けを容易にする。 In one preferred embodiment of the syringe of the invention, the inner wall of the cylinder has one or more small longitudinal grooves extending from the open end of the cylinder to a point somewhat above the horizontal plane of the drug contained in the cylinder. exist. This groove facilitates positioning of the plunger to the correct depth, especially in the case of automated assembly.
特に薬剤の所定量の投与のために使用する場合
に、好適な注射器の更に他の形態は、プランジヤ
ーのシヤフト上のねじ山の付けられた手段と協同
する内側にねじが切つてある薬剤投与量を調節す
る回転可能な調節リングによつて与えられる。こ
の調節リングはプランジヤーのシヤフト上の望ま
しい位置に位置させることができる。この場合
に、調節リングは円筒の開口端に対する留め具と
して働いて、プランジヤーの移動の深さを制限す
る。 Yet another form of syringe suitable, especially when used for the administration of a predetermined amount of a drug, is an internally threaded drug dosage device which cooperates with threaded means on the shaft of the plunger. provided by a rotatable adjustment ring to adjust the This adjustment ring can be positioned at a desired location on the shaft of the plunger. In this case, the adjustment ring acts as a fastener to the open end of the cylinder, limiting the depth of movement of the plunger.
小直径の注射器においては、プランジヤーのシ
ヤフト上のねじ山は、特に注射器を一回の投薬操
作で使用する場合には、望ましい点への調節リン
グの配置を迅速にするために、大直径の注射器に
おけるねじ山よりも大きなピツチを有しているこ
とが望ましい。取扱い者がプランジヤーを調節リ
ングが円筒に接するまで押し込みプランジヤーを
放すと、ねじ山のピツチが比較的大きいので、圧
力を解放するために調節リングが逆向きに回転す
るおそれがある。それ故、このような注射器に対
しては、円筒の開口端は、調節リングが開口端と
接する調節リングの表面上に設けられた固定手段
と協働する、係止手段を含む平坦部を有している
ことが好ましい。このような協働する固定手段と
係止手段は、調節リングのこのような逆向きの移
動を防止して、プランジヤーに設定された投与量
の投与を確実なものとする。 On small diameter syringes, the threads on the shaft of the plunger are similar to those on large diameter syringes to speed up the placement of the adjustment ring to the desired point, especially when the syringe is used in a single dosing operation. It is desirable that the thread has a larger pitch than the thread in the thread. If the operator pushes the plunger until the adjustment ring contacts the cylinder and releases the plunger, the relatively large pitch of the threads may cause the adjustment ring to rotate in the opposite direction to relieve pressure. Therefore, for such a syringe, the open end of the cylinder has a flat section containing locking means, which cooperates with fixing means provided on the surface of the adjusting ring where the adjusting ring contacts the open end. It is preferable that you do so. Such co-operating fixing and locking means prevent such reverse movement of the adjustment ring and ensure administration of the dose set on the plunger.
本考案の注射器10を第1図に示す。注射用薬
剤排出端16上にキヤツプ14を有する円筒12
は、開放端すなわち開口端18を有している。開
口端18はプランジヤー22の導入を容易にする
ために僅かなテーパー20(第7図)を有してい
てもよい。円筒12はその開口端18に、平坦部
24を有することもできる。好適実施形態におい
ては、円筒の入口部は、開口端18から円筒の内
壁28に僅かな距離だけのびている4本の溝26
を有しており(第7および8図)、これらの溝も
また、特に自動化した組立ての場合に、プランジ
ヤーの挿入を容易にする。 A syringe 10 of the present invention is shown in FIG. A cylinder 12 with a cap 14 on an injectable drug outlet 16
has an open end 18. Open end 18 may have a slight taper 20 (FIG. 7) to facilitate introduction of plunger 22. The cylinder 12 can also have a flattened portion 24 at its open end 18. In a preferred embodiment, the inlet portion of the cylinder includes four grooves 26 extending a short distance from the open end 18 into the inner wall 28 of the cylinder.
(FIGS. 7 and 8), these grooves also facilitate insertion of the plunger, especially in the case of automated assembly.
この実施形態におけるプランジヤー22は、一
端に取扱い者が指をあてがうための平坦部32
を、そして前端にプランジヤーヘツド34を有す
るシヤフトからなつている。プランジヤーシール
36と協働し且つプランジヤーシール36と係合
するために適応しプランジヤーヘツド34は、円
形のヘツドプレート38と、ヘツドプレート38
と同じ直径を有するリアプレート44から成る係
合手段を有している。4つの等間隔の放射状のひ
れ40の先に延びた円形のヘツドプレート38
は、平坦部42を形成する。プランジヤーヘツド
34は、ヘツドプレート38の直径より小さい直
径を有する中間の支持プレート46をも有するこ
とができる。 The plunger 22 in this embodiment has a flat portion 32 at one end for the operator to place his or her finger on.
and a shaft having a plunger head 34 at its front end. The plunger head 34 is adapted to cooperate with and engage the plunger seal 36 and includes a circular head plate 38 and a circular head plate 38.
It has engagement means consisting of a rear plate 44 having the same diameter as . a circular head plate 38 extending beyond four equally spaced radial fins 40;
forms a flat portion 42. Plunger head 34 may also have an intermediate support plate 46 having a diameter smaller than the diameter of head plate 38.
プランジヤーシール36は、頭端部と円筒12
の穴の内径よりも僅かに大きな直径を有し頭端部
に連続する環状側部から成る。プランジヤーシー
ル36は、プランジヤーヘツド34上に取り付け
られるためにプランジヤーシール36を広がらせ
る(第4図参照)ための切れ目48を与えるよう
に縦方向に切れ目が入れられている。切れ目48
は、それによつてプランジヤーシールを広げるこ
とができる限りは、例えば斜めの切り目またはそ
の他の別の形状を有していてもよい。しかしなが
ら、切れ目48は、正常な環状の形態ではなくな
るプランジヤーシールのよじれを防止することを
助ける構造を生じさせるために、50で示すよう
な、プランジヤーシールの縦の軸線方向と直角方
向に短い距離折れ曲がつている部分を形成されて
いるような、不規則性を有することが好ましい。
このような切れ目の不規則性は、プランジヤーシ
ール36の頭端部近傍に位置させる。環状のプラ
ンジヤーシール36の中間部分52の内径は、プ
ランジヤーシール36の両端部の内径よりも小さ
く、嵌合手段を形成し、プランジヤーヘツド34
上のプレート38と44の間にあるくぼみ中に適
合しており、プランジヤーシール36とプランジ
ヤーヘツド34が係合するのはこの部分である。 The plunger seal 36 has a head end and a cylinder 12.
It consists of an annular side section continuous to the head end and having a diameter slightly larger than the inner diameter of the hole. Plunger seal 36 is longitudinally scored to provide a cut 48 for expanding plunger seal 36 (see FIG. 4) for installation onto plunger head 34. Cut 48
may have, for example, a diagonal cut or other shape, as long as it allows the plunger seal to expand. However, the cut 48 is short in the direction perpendicular to the longitudinal axis of the plunger seal, as shown at 50, to create a structure that helps prevent kinking of the plunger seal that takes it out of its normal annular configuration. It is preferable to have an irregularity such as a portion that is bent over a distance.
Such cut irregularities are located near the head end of the plunger seal 36. The inner diameter of the intermediate portion 52 of the annular plunger seal 36 is smaller than the inner diameter of the ends of the plunger seal 36, forming a mating means and connecting the plunger head 34.
It fits into a recess between upper plates 38 and 44, and it is here that plunger seal 36 and plunger head 34 engage.
所定量のまたは何回もの用量の投与を行なうた
めに、シヤフト30は、シヤフトの全長にわたつ
て相互に直角に間隔を置いた4本の放射状のリブ
40を有している。多数の歯54が外側の縁上に
間隔を置いて設けられており、1つのリブ上の歯
は隣接するリブ上の歯に対して互い違いの関係に
あり、それによつて一定のピツチを有するねじと
しての配置が与えらている。プランジヤー長さ調
節部材、即ち調節リング56は内側にねじ山58
を有しており、ねじ山58は調節リング56をシ
ヤフト30上で前後に回転させることができるよ
うに歯54の間のくぼみに適合するようにしてあ
る。プランジヤーシール36をプランジヤーヘツ
ド34上に係合させる前に、調節リング56をシ
ヤフト30上に最初に取り付ける。 To effect the administration of a predetermined amount or multiple doses, the shaft 30 has four radial ribs 40 spaced at right angles from each other over the entire length of the shaft. A number of teeth 54 are spaced apart on the outer edge, the teeth on one rib being in a staggered relationship with respect to the teeth on an adjacent rib, thereby providing a thread having a constant pitch. The placement is given as follows. The plunger length adjustment member or adjustment ring 56 is internally threaded 58.
, and the threads 58 are adapted to fit into the recesses between the teeth 54 so that the adjusting ring 56 can be rotated back and forth on the shaft 30. Prior to engaging the plunger seal 36 onto the plunger head 34, the adjustment ring 56 is first installed onto the shaft 30.
例えば駆虫剤ペーストのような、所望の薬剤組
成物59を、適当な水準まで円筒中に入れたの
ち、プランジヤーを円筒の開口端に挿入して、プ
ランジヤーを薬剤の水準まで押し下げると、円筒
中の空気は、プランジヤーシール36が溝26を
越えるまでは溝26から逃げる。プランジヤーシ
ール36が溝26を越えた後は、円筒中の空気は
切れ目48によつて形成された溝を通過すること
ができ、注射器から残留空気は逃げる。次いで調
節リング56を標識60が示すようなシヤフト上
の指定点まで回転させる。キヤツプ14を除いた
のち、調節リング56が円筒の平坦部24に当つ
て停止するまでプランジヤーを押すことによつ
て、所望用量の薬剤を排出させる。 After filling the cylinder with the desired drug composition 59, such as an anthelmintic paste, to the appropriate level, a plunger is inserted into the open end of the cylinder and the plunger is depressed down to the level of the drug, causing the amount of the drug in the cylinder to reach the appropriate level. Air escapes from groove 26 until plunger seal 36 clears groove 26. After the plunger seal 36 clears the groove 26, air in the cylinder can pass through the groove formed by the cut 48 and residual air escapes from the syringe. Adjustment ring 56 is then rotated to a designated point on the shaft as indicated by marker 60. After removing the cap 14, the desired dose of drug is expelled by pushing the plunger until the adjustment ring 56 stops against the flat 24 of the cylinder.
比較的小さい直径の円筒を有しその故比較的細
いプランジヤーのシヤフトを有する注射器は、比
較的長いプランジヤー上のシヤフトの歯と同一の
ピツチを与えるために比較的小さな歯54を有し
ているか、または同一の大きさの歯を用いる場合
はピツチを遥かに大きいものとする必要がある。
比較的小さい、一度で投薬を行なう注射器を、馬
の口に駆虫剤ペーストを入れるためにしばしば用
いるが、獣医は、調節リングを適当な設定位置と
するためにきわめて多数の回転を必要とするよう
な、プランジヤー上の調節リングを回転させるた
めに時間がかかることを望まない。それ故、比較
的急なピツチを有するねじ山付きのシヤフトがき
わめて好適である。残念ながら、このような注射
器においてプランジヤーをペーストに対して押し
下げるときに、もしもプランジヤーに対して圧力
を保持しなければ、圧力は調節リングに対する押
しによつて消失し且つ時によると調節リングの逆
向きの回転を生じさせる。そのようなときには適
正な用量を確実に投与することはできない。この
ような問題を回避するために、円筒の平坦部24
および調節リング56の上に係止手段および固定
手段を設ける。第1図および第5図に示す実施形
態においては、これらの手段は、円筒の排出端に
面していない平坦部24の表面上、開口端18の
両側に一つずつ設けられた突出する2個の突起す
なわち固定用ピン62、および調節リング56の
固定用ピンに相対する表面上に円周的に配置した
一連の小さな固定用穴64の形態をとつている。
固定用ピン62が2つの固定用穴64に係合する
とき、調節リングはその場に固定され、圧力下に
逆戻りすることがなくなり、プランジヤーの移動
を防止できる。 A syringe with a relatively small diameter cylinder and therefore a relatively narrow plunger shaft may have relatively small teeth 54 to provide the same pitch as the shaft teeth on a relatively long plunger; Alternatively, if teeth of the same size are used, the pitch needs to be much larger.
Relatively small, single-dose syringes are often used to introduce deworming paste into the horse's mouth, but veterinarians have found that the adjustment ring requires a significant number of turns to get into the proper setting. However, you don't want to take the time to rotate the adjustment ring on the plunger. A threaded shaft with a relatively steep pitch is therefore highly preferred. Unfortunately, when pressing the plunger down against the paste in such syringes, if pressure is not maintained against the plunger, the pressure is dissipated by pushing against the adjustment ring and sometimes reverses the adjustment ring. causes the rotation of In such cases, it is not possible to ensure that the correct dose is administered. In order to avoid such problems, the flat part 24 of the cylinder
and locking and fixing means are provided on the adjustment ring 56. In the embodiment shown in FIGS. 1 and 5, these means include two projecting sections, one on each side of the open end 18, on the surface of the flat part 24 facing away from the discharge end of the cylinder. It takes the form of two projections or locking pins 62 and a series of small locking holes 64 arranged circumferentially on the surface of the adjustment ring 56 opposite the locking pins.
When the fixing pin 62 engages the two fixing holes 64, the adjustment ring is fixed in place and cannot move back under pressure, preventing the plunger from moving.
本考案の精神の範囲内で多くの変更が可能であ
り、それ故、上記の特定的な実施例は単に例とし
てのものにすぎず、本考案の範囲は実用新案鶫録
請求の範囲によつて限定されるのみである。 Many modifications may be made within the spirit of the invention and, therefore, the specific embodiments described above are merely exemplary and the scope of the invention is defined by the claims of the Utility Model Register. It is only limited.
第1図は薬剤を予め充填した本考案の注射器を
示す部分的に断面とした立面図である。第2図は
プランジヤーヘツドの係合手段を示しているプラ
ンジヤーの部分的立面図である。第3図はプラン
ジヤーシールの上平面図である。第4図は部分的
に広げられた状態におけるプランジヤーシールの
立面図である。第5図はプランジヤー長さ調節部
材の一実施形態である調節リングの前端の図であ
る。第6図は第5図の調節リングを部分的に断面
とした立面図である。第7図は注射器の円筒の断
面的立面図である。第8図は第7図の円筒の上平
面図である。
10……注射器、12……円筒、14……キヤ
ツプ、16……排出端、18……開口端、22…
…プランジヤー、24……開口端の平坦部、26
……溝、30……シヤフト、32……プランジヤ
ーの平坦端部、34……プランジヤーヘツド、3
6……プランジヤーシール、38……ヘツドプレ
ート、40……リブ、44……リアプレート、4
8……切れ目、50……切れ目の折れ曲がり部
分、52……プランジヤーシールの中間部分、5
4……歯、56……調節リング、58……ねじ
山、59……薬剤組成物、62……固定用ピン、
64……固定用穴。
FIG. 1 is an elevational view, partially in section, showing a syringe of the present invention prefilled with a drug. FIG. 2 is a partial elevational view of the plunger showing the engagement means of the plunger head. FIG. 3 is a top plan view of the plunger seal. FIG. 4 is an elevational view of the plunger seal in a partially expanded condition. FIG. 5 is a view of the front end of an adjustment ring that is one embodiment of a plunger length adjustment member. 6 is an elevational view, partially in section, of the adjustment ring of FIG. 5; FIG. FIG. 7 is a cross-sectional elevational view of the syringe cylinder. FIG. 8 is a top plan view of the cylinder of FIG. 7. 10...Syringe, 12...Cylinder, 14...Cap, 16...Discharge end, 18...Open end, 22...
...Plunger, 24...Flat part of opening end, 26
... groove, 30 ... shaft, 32 ... flat end of plunger, 34 ... plunger head, 3
6... Plunger seal, 38... Head plate, 40... Rib, 44... Rear plate, 4
8... Cut, 50... Bent part of the cut, 52... Middle part of plunger seal, 5
4...Teeth, 56...Adjustment ring, 58...Screw thread, 59...Drug composition, 62...Fixing pin,
64...Fixing hole.
Claims (1)
出端の反対側に該プランジヤーを受け入れる開口
端を有する円筒とから成る注射器であつて、 プランジヤーは、該円筒に挿入される先端部に
離脱可能なプランジヤーシールに係合する係合手
段を備えたプランジヤーヘツドを有し、 プランジヤーシールは、該プランジヤーヘツド
と嵌装する頭端部およびそれに連続する環状側部
とからなり、そして切れ目が設けられており、 該切れ目は、該プランジヤーシールの縦の軸線
方向に概ね平行に延びているが、該頭端部近傍で
軸線方向と概ね直角に短い距離折れ曲がり、更に
軸線方向と概ね平行に再び折れ曲がり、 該プランジヤーシールは、該切れ目により、プ
ランジヤーヘツドの該係合手段に係合するために
広げられることが可能であり、しかしその後プラ
ンジヤーヘツドの係合手段と完全に係合すると切
れ目が広がつていない状態に戻るように構成され
ていることを特徴とする注射器。[Claims for Utility Model Registration] A syringe comprising a plunger and a cylinder having a discharge end for an injectable drug and an open end for receiving the plunger on the opposite side of the discharge end, the plunger being inserted into the cylinder. The plunger head has an engaging means for engaging a removable plunger seal at its distal end, and the plunger seal has a head end that engages with the plunger head and an annular side part that is continuous therewith. and is provided with a slit, the slit extending generally parallel to the longitudinal axis of the plunger seal, but bent a short distance generally perpendicular to the axial direction near the head end; bending again generally parallel to the axial direction, the plunger seal is capable of being unfolded by the cut to engage the engagement means of the plunger head, but then the engagement means of the plunger head A syringe characterized in that the syringe is configured such that the cut returns to an unwidened state when the syringe is fully engaged with the syringe.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/059,861 US4246898A (en) | 1979-07-23 | 1979-07-23 | Syringe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH021162U JPH021162U (en) | 1990-01-08 |
JPH0215502Y2 true JPH0215502Y2 (en) | 1990-04-25 |
Family
ID=22025766
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9886880A Pending JPS5620465A (en) | 1979-07-23 | 1980-07-21 | Injector |
JP1989024838U Expired JPH0215502Y2 (en) | 1979-07-23 | 1989-03-06 | |
JP1991054496U Expired - Lifetime JPH0517068Y2 (en) | 1979-07-23 | 1991-06-19 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9886880A Pending JPS5620465A (en) | 1979-07-23 | 1980-07-21 | Injector |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1991054496U Expired - Lifetime JPH0517068Y2 (en) | 1979-07-23 | 1991-06-19 |
Country Status (15)
Country | Link |
---|---|
US (1) | US4246898A (en) |
EP (1) | EP0022987B1 (en) |
JP (3) | JPS5620465A (en) |
KR (2) | KR830003218A (en) |
AR (1) | AR221772A1 (en) |
AU (1) | AU543457B2 (en) |
CA (1) | CA1147627A (en) |
DE (1) | DE3062822D1 (en) |
DK (1) | DK156377C (en) |
ES (1) | ES252203Y (en) |
IE (1) | IE49857B1 (en) |
MX (1) | MX148110A (en) |
NO (1) | NO149720C (en) |
NZ (1) | NZ194395A (en) |
ZA (1) | ZA804417B (en) |
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-
1979
- 1979-07-23 US US06/059,861 patent/US4246898A/en not_active Expired - Lifetime
-
1980
- 1980-07-09 NO NO802064A patent/NO149720C/en unknown
- 1980-07-10 DE DE8080103948T patent/DE3062822D1/en not_active Expired
- 1980-07-10 EP EP80103948A patent/EP0022987B1/en not_active Expired
- 1980-07-15 CA CA000356255A patent/CA1147627A/en not_active Expired
- 1980-07-16 MX MX183180A patent/MX148110A/en unknown
- 1980-07-17 AU AU60471/80A patent/AU543457B2/en not_active Ceased
- 1980-07-21 JP JP9886880A patent/JPS5620465A/en active Pending
- 1980-07-21 NZ NZ194395A patent/NZ194395A/en unknown
- 1980-07-22 ZA ZA00804417A patent/ZA804417B/en unknown
- 1980-07-22 KR KR1019800002094A patent/KR830003218A/en unknown
- 1980-07-22 ES ES1980252203U patent/ES252203Y/en not_active Expired
- 1980-07-22 KR KR1019800002904A patent/KR840001799B1/en active
- 1980-07-22 DK DK315580A patent/DK156377C/en active
- 1980-07-22 IE IE1518/80A patent/IE49857B1/en not_active IP Right Cessation
- 1980-07-23 AR AR281866A patent/AR221772A1/en active
-
1989
- 1989-03-06 JP JP1989024838U patent/JPH0215502Y2/ja not_active Expired
-
1991
- 1991-06-19 JP JP1991054496U patent/JPH0517068Y2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
AU543457B2 (en) | 1985-04-18 |
IE49857B1 (en) | 1985-12-25 |
JPH0488951U (en) | 1992-08-03 |
AU6047180A (en) | 1982-02-04 |
NZ194395A (en) | 1982-11-23 |
NO149720B (en) | 1984-03-05 |
JPH0517068Y2 (en) | 1993-05-07 |
KR830003218A (en) | 1983-06-18 |
DK156377B (en) | 1989-08-14 |
ES252203Y (en) | 1981-05-16 |
DE3062822D1 (en) | 1983-05-26 |
US4246898A (en) | 1981-01-27 |
JPS5620465A (en) | 1981-02-26 |
DK315580A (en) | 1981-01-24 |
ES252203U (en) | 1980-11-16 |
EP0022987A1 (en) | 1981-01-28 |
NO149720C (en) | 1984-06-13 |
EP0022987B1 (en) | 1983-04-20 |
IE801518L (en) | 1981-01-23 |
NO802064L (en) | 1981-01-26 |
DK156377C (en) | 1989-12-27 |
MX148110A (en) | 1983-03-14 |
JPH021162U (en) | 1990-01-08 |
ZA804417B (en) | 1981-08-26 |
AR221772A1 (en) | 1981-03-13 |
KR840001799B1 (en) | 1984-10-20 |
CA1147627A (en) | 1983-06-07 |
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